Rehab insert sleeves allow for low impact replacement of existing concrete wet wells. They are pre-packaged fiberglass systems that are typically sized 8 inches smaller than the inside diameter of the existing structure. They are grouted in place and can be used for the entire life cycle of a project. Measurement of the existing concrete wet well is required prior to preparing CAD drawings of the new fiberglass insert for approval.
2. Rehab Insert Sleeves
Allow “Low Impact” construction methods
for wet well replacement
Fully pre-packaged systems, ready for
pumps
Typically sized at 8” less than inside
diameter of existing concrete structure
Field installation of inlet hubs
Grouted in place
DSL for the entire life cycle of the project
3. Rehab Insert Sleeves
Measure existing concrete wet well
Measure interior diameter at multiple
locations
Measure interior bottom elevation
Measure top elevation
Measure interior filet or benched
bottoms
Measure interior inlets
Pipe type and pipe O.D
Measure discharge centerline elevation
Measure interior bottom area
4. Rehab Insert Sleeves
2. Prepare Cad drawings of new fiberglass wet well insert for engineer approval
5. Rehab Insert Sleeves (Hickory Park Project)
1. Delivery of new tank. 2. Establish bypass pumping and well point dewatering.
6. 3. Remove top slab from existing concrete wet well along with pumps, piping, and rails.
Rehab Insert Sleeves (Hickory Park Project)
7. 4. Begin cleaning of existing station by pumping out sludge, loose mortar, bricks, and trash.
Rehab Insert Sleeves (Hickory Park Project)
8. 5. Cut off inlet pipes flush with existing concrete wet well and chip out around existing inlet
daspipes to accept a new pipe hub.
Rehab Insert Sleeves (Hickory Park Project)
9. 6. Insert the new FRP sleeve into the existing concrete wet well for a dry fit, insuring the .
……tank is centered in the hole.
Rehab Insert Sleeves (Hickory Park Project)
10. 7. FTS field crew will cut openings for all inlet pipes, insert new pipe hubs through the wall,
. and structurally bond pipe stubs in place.
Rehab Insert Sleeves (Hickory Park Project)
11. 8. Pump concrete flowable fill into interstitial space between fiberglass insert and the .
……existing concrete wet well.
Rehab Insert Sleeves (Hickory Park Project)
12. 9. Install pumps, controls, electrical service, and other mechanical equipment as needed for
. start-up.
Rehab Insert Sleeves (Hickory Park Project)
